Residential Air Conditioning Specialist


Seasonal tune-ups of your A/C or central air unit is a must for prolonging the life and efficient operation of your indoor climate control system. Whether your system is turning on and blowing warm air or not turning on at all, call Koval. We will provide a fair and honest estimate at no charge. Our repair services are reasonable and we can work around your schedule.

We work on all makes and models! Call Koval for immediate assistance on:

  • Air conditioning
  • New systems
  • Air handlers
  • Heat pumps
  • Ductless mini splits
  • System replacements
  • Hydro-air systems
  • Energy efficient thermostats
  • Installations and replacements
  • Tune-ups
  • And more  

Air Conditioning Services - AC Repairs and Installation - Middlesex County MA - ac1Looking for solutions to cooling your upstairs or 3-season room? Koval has the answer! We can install window or wall units that work independently from your home’s system. While a wall unit is not strong enough to cool an entire house, it’s perfect for those rooms either lacking a vent or too far away from the main unit to get air.

With a little effort, wall units can remain in place all year round. As part of the installation of our energy efficient ductless wall unit, we seal any gaps with weather stripping. You simply need to cover the vents with weather stripping and cover the condenser with a canvas or vinyl during the winter months.

You can depend on Koval to keep you cool when the weather gets hot. We have day, evening and weekend appointments available for commercial and residential HVAC maintenance and repair in MA and NH.

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...Not only did they meet our schedule and budget, but they exceeded all our expectations... Tyler T., Middlesex MA Leave A Review